what can cause hard starting on mornings and after parking for a while

Asked by Jan 20, 2016 at 08:27 AM about the 2011 Porsche Cayenne Turbo AWD

Question type: Maintenance & Repair

my 2011 cayenne diesel hard starts after parking for a while sometimes wont
start at all battery dies i changed starter ,battery, high pressure pump,
injectors,accelerator peddle once the car starts it work fine a little smoke pulls
great please help

3 Answers

24,715

Porsche made a diesel suv? wow- learn somethin' new every day- I guess "Porsche" doesn't mean what it used to- is it cold where you are? have you done a compression test? you mention a lot of stuff replaced, but have you replaced the glo plugs? you know, it's the usual drill with starting an old diesel on a cold morning- weren't you prepared for all this when you decided owning a diesel is a good idea? the accelerator pedal? really? so many questions-

109,945

Is the smoke white? On a diesel that would indicate air in the fuel system, I don't know much about Porsche, but I have seem air in fuel problems in Diesels.

2,170

You've got a VW V-6 Diesel from the Toureg suv line. Sounds as if the fuel pump is going or the check valve the maintains fuel pressure is sticking open. Check with a VW shop or if your desperate try a VW stealership. Good luck!

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